Under extrusion? gaps between layers.

[Greg1980 0]

Hi

 

One of our Ultimaker 2+ printers has this problem.  We have changed filaments, adjusted the feeder tension at all positions.  We have replaced the original tubing with a new one, consisting of the same diameters, and even checked the glass plate with a thermonuclear, and the temperatures are consistent across the glass plate  However the problem still persists, and we don't know what to do. It is occurring mainly towards the back of the print, and in the pictures it looks stringy and individual layers with gaps between them. But at the front everything looks fine, all nicely stuck together, with the proper consistency.  This is only happening on 1 printer.

 

Any help and ideas would be much appreciated.

 

Thanks 

 

Greg

[gr5 2,230]

This is a leveling issue (glass too low in the rear).  It could be that you simply need to turn the rear screw about one full turn CCW as seen from below to move the glass up.  Likely even.

 

Or your glass might not be level.  But even if the glass is warped horribly, it should be printing perfect near the rear screw so:  you're leveling is out.  I like to level so it squishes the bottom layer quite a bit.